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[SCSI] hpsa: check that simple mode is supported

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before trying to enter simple mode transport method.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Stephen M. Cameron 2010-05-27 15:13:53 -05:00 committed by James Bottomley
parent eb6b2ae905
commit cda7612d4b
1 changed files with 5 additions and 0 deletions
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5
drivers/scsi/hpsa.c
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@ -3413,6 +3413,11 @@ static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
{
int i;
u32 trans_support;
trans_support = readl(&(h->cfgtable->TransportSupport));
if (!(trans_support & SIMPLE_MODE))
return -ENOTSUPP;
h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
/* Update the field, and then ring the doorbell */